[osg-users] replace tile with my own Node in VPB generated QuadTree

Robert Osfield robert.osfield at gmail.com
Sat Dec 3 02:34:09 PST 2016

Hi Nick,

I don't really know what bit you are confused by.  It's really just a
straight quad tree with PagedLOD inserted to enable the paging.  The
TerrainTile nodes represent a single tile to be rendered for a
particular LOD level and holds the data that describes the imagery and
DEMS and position in space.  The TerrainTechnique is responsible for
creating the subgraphs that does the actual rendering of that data,
typically contains the transform from local to ECEF.


On 3 December 2016 at 02:28, Trajce Nikolov NICK
<trajce.nikolov.nick at gmail.com> wrote:
> Hi Robert, Community,
> I am hacking the VPB process again :-).
> The story is this: I transform tiles back from ECEF to local, do something
> with the Geometry and I want to replace the tile with my own Node. Spent
> already hours reading and trying to understand the SceneGraph with all this
> transforms, and I am failing.
> Any words of how these tiles in the QuadTree are represented? I mean the
> tree and the transforms, I know the facts that they are coming from
> TerrainTiles with proper Locators, but after when the GeometryTechnique is
> applied.
> Thanks so much for any word on this. It is the last bump in my current dev
> Cheers,
> Nick
> --
> trajce nikolov nick
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